Remove unused eca_base.md

Author: ericdallo

resources/META-INF/native-image/eca/eca/native-image.properties

@@ -8,7 +8,6 @@ Args=-J-Dborkdude.dynaload.aot=true \
      -H:-CheckToolchain \
      -H:Log=registerResource: \
      -H:IncludeResources=ECA_VERSION \
-     -H:IncludeResources=prompts/eca_base.md \
      -H:IncludeResources=prompts/plan_behavior.md \
      -H:IncludeResources=prompts/agent_behavior.md \
      -H:IncludeResources=prompts/init.md \